Weather Alerts For South Orleans, MA
Coastal Flood Statement
-# HEADLINE -------------------- COASTAL FLOOD STATEMENT IN EFFECT FROM 11 PM EDT THIS EVENING THROUGH LATE TONIGHT # SUMMARY -------------------- Gloucester Harbor MLLW Categories - Minor 11.5 ft, Moderate 13.0 ft, Major 15.0 ft MHHW Categories - Minor 1.9 ft, Moderate 3.4 ft, Major 5.4 ft Total Total Departure Day/Time Tide Tide from Norm Waves Flood ft MLLW ft MHHW ft ft Impact -------- --------- --------- --------- ------- -------- 18/12 PM 9.8/10.3 0.2/ 0.7 0.5/ 1.0 2-3 None 19/01 AM 11.1/11.6 1.5/ 2.0 0.2/ 0.8 3 None 19/01 PM 10.0/10.5 0.4/ 0.9 0.6/ 1.1 3-4 None 20/02 AM 11.1/11.6 1.5/ 2.0 0.2/ 0.7 3 None 20/02 PM 9.4/ 9.9 -0.2/ 0.2 0.1/ 0.6 2 None 21/02 AM 10.7/11.2 1.1/ 1.6 0.0/ 0.5 2-3 None Merrimack River near Newburyport MA MLLW Categories - Minor 11.0 ft, Moderate 12.0 ft, Major 13.5 ft MHHW Categories - Minor 1.5 ft, Moderate 2.5 ft, Major 4.0 ft Total Total Departure Day/Time Tide Tide from Norm Waves Flood ft MLLW ft MHHW ft ft Impact -------- --------- --------- --------- ------- -------- 18/01 PM 8.9/ 9.4 -0.7/-0.2 0.2/ 0.8 2 None 19/01 AM 10.1/10.6 0.6/ 1.1 0.2/ 0.8 2-3 None 19/02 PM 9.0/ 9.5 -0.6/-0.1 0.5/ 1.0 3 None 20/02 AM 10.1/10.6 0.6/ 1.1 0.2/ 0.7 2 None 20/02 PM 8.3/ 8.8 -1.3/-0.8 0.1/ 0.6 2 None 21/03 AM 9.8/10.3 0.2/ 0.8 0.0/ 0.5 2 None Boston Harbor MLLW Categories - Minor 12.5 ft, Moderate 14.0 ft, Major 15.0 ft MHHW Categories - Minor 2.2 ft, Moderate 3.7 ft, Major 4.7 ft Total Total Departure Day/Time Tide Tide from Norm Waves Flood ft MLLW ft MHHW ft ft Impact -------- --------- --------- --------- ------- -------- 18/12 PM 10.5/11.0 0.2/ 0.7 0.2/ 0.8 1-2 None 19/01 AM 12.0/12.5 1.7/ 2.2 0.4/ 0.9 1 None 19/01 PM 10.8/11.3 0.5/ 1.0 0.6/ 1.1 1-2 None 20/01 AM 11.7/12.2 1.4/ 1.9 0.2/ 0.8 1-2 None 20/02 PM 10.2/10.7 -0.2/ 0.3 0.2/ 0.7 1 None 21/02 AM 11.5/12.0 1.2/ 1.7 0.2/ 0.7 1 None Revere MLLW Categories - Minor 12.5 ft, Moderate 14.5 ft, Major 16.0 ft MHHW Categories - Minor 2.6 ft, Moderate 4.6 ft, Major 6.1 ft Total Total Departure Day/Time Tide Tide from Norm Waves Flood ft MLLW ft MHHW ft ft Impact -------- --------- --------- --------- ------- -------- 18/12 PM 10.4/10.9 0.5/ 1.0 0.2/ 0.8 1-2 None 19/01 AM 11.7/12.2 1.8/ 2.2 0.2/ 0.8 1 None 19/01 PM 10.6/11.1 0.7/ 1.1 0.5/ 1.0 1-2 None 20/01 AM 11.4/11.9 1.5/ 2.0 0.2/ 0.7 1-2 None 20/02 PM 9.8/10.3 -0.2/ 0.3 0.0/ 0.5 1 None 21/02 AM 11.1/11.6 1.2/ 1.7 0.0/ 0.5 1 None Green Harbor MLLW Categories - Minor 11.5 ft, Moderate 13.5 ft, Major 15.5 ft MHHW Categories - Minor 1.6 ft, Moderate 3.6 ft, Major 5.6 ft Total Total Departure Day/Time Tide Tide from Norm Waves Flood ft MLLW ft MHHW ft ft Impact -------- --------- --------- --------- ------- -------- 18/01 PM 10.0/10.5 0.1/ 0.6 0.2/ 0.7 1-2 None 19/01 AM 11.4/11.9 1.5/ 2.0 0.2/ 0.8 2 Minor 19/01 PM 10.2/10.7 0.2/ 0.8 0.6/ 1.1 2 None 20/02 AM 11.4/11.9 1.5/ 2.0 0.2/ 0.7 2 Minor 20/02 PM 9.8/10.3 -0.2/ 0.3 0.2/ 0.7 2 None 21/03 AM 11.2/11.7 1.3/ 1.8 0.1/ 0.6 2 None Scituate MA MLLW Categories - Minor 11.5 ft, Moderate 13.5 ft, Major 15.5 ft MHHW Categories - Minor 1.8 ft, Moderate 3.8 ft, Major 5.8 ft Total Total Departure Day/Time Tide Tide from Norm Waves Flood ft MLLW ft MHHW ft ft Impact -------- --------- --------- --------- ------- -------- 18/01 PM 9.9/10.4 0.2/ 0.7 0.2/ 0.8 2 None 19/01 AM 11.4/11.9 1.7/ 2.2 0.5/ 1.0 2-3 Minor 19/01 PM 10.2/10.7 0.5/ 1.0 0.7/ 1.1 3 None 20/02 AM 11.3/11.8 1.6/ 2.0 0.2/ 0.8 3 Minor 20/02 PM 9.6/10.1 -0.2/ 0.3 0.2/ 0.7 2 None 21/02 AM 11.0/11.5 1.3/ 1.8 0.2/ 0.7 2 None Buzzards Bay at Woods Hole MLLW Categories - Minor 5.5 ft, Moderate 7.0 ft, Major 8.5 ft MHHW Categories - Minor 3.5 ft, Moderate 5.0 ft, Major 6.5 ft Total Total Departure Day/Time Tide Tide from Norm Waves Flood ft MLLW ft MHHW ft ft Impact -------- --------- --------- --------- ------- -------- 18/10 PM 2.7/ 3.2 0.7/ 1.1 0.0/ 0.5 1-2 None 19/10 AM 2.0/ 2.5 0.0/ 0.5 0.2/ 0.8 1-3 None 19/10 PM 2.2/ 2.7 0.2/ 0.8 -0.2/ 0.2 2 None 20/10 AM 1.5/ 2.0 -0.6/-0.1 0.2/ 0.7 2 None 20/11 PM 1.9/ 2.3 -0.2/ 0.3 -0.6/-0.1 1-2 None Chatham MA - East Coast MLLW Categories - Minor 9.0 ft, Moderate 11.5 ft, Major 13.0 ft MHHW Categories - Minor 3.8 ft, Moderate 6.3 ft, Major 7.8 ft Total Total Departure Day/Time Tide Tide from Norm Waves Flood ft MLLW ft MHHW ft ft Impact -------- --------- --------- --------- ------- -------- 18/01 PM 5.6/ 6.1 0.4/ 0.9 0.4/ 0.9 2-3 None 19/01 AM 6.6/ 7.1 1.4/ 1.9 0.2/ 0.8 3 None 19/02 PM 5.7/ 6.2 0.5/ 1.0 0.5/ 1.0 3-4 None 20/02 AM 6.7/ 7.2 1.5/ 2.0 0.2/ 0.8 3 None 20/03 PM 5.1/ 5.6 -0.2/ 0.3 0.1/ 0.6 2 None 21/03 AM 6.4/ 6.9 1.2/ 1.7 0.1/ 0.6 2 None Chatham - South side MLLW Categories - Minor 9.0 ft, Moderate 10.5 ft, Major 11.5 ft MHHW Categories - Minor 4.5 ft, Moderate 6.0 ft, Major 7.0 ft Total Total Departure Day/Time Tide Tide from Norm Waves Flood ft MLLW ft MHHW ft ft Impact -------- --------- --------- --------- ------- -------- 18/02 PM 4.0/ 4.5 -0.6/-0.1 0.2/ 0.7 2 None 19/02 AM 5.2/ 5.7 0.8/ 1.3 0.5/ 1.0 2 None 19/02 PM 4.4/ 4.9 -0.2/ 0.3 0.7/ 1.1 3 None 20/02 AM 5.2/ 5.7 0.8/ 1.3 0.4/ 0.9 2-3 None 20/04 PM 3.9/ 4.4 -0.7/-0.2 0.2/ 0.7 2 None 21/03 AM 5.0/ 5.5 0.5/ 1.0 0.1/ 0.6 2 None Hyannis Harbor MLLW Categories - Minor 5.0 ft, Moderate 6.5 ft, Major 8.5 ft MHHW Categories - Minor 1.2 ft, Moderate 2.7 ft, Major 4.7 ft Total Total Departure Day/Time Tide Tide from Norm Waves Flood ft MLLW ft MHHW ft ft Impact -------- --------- --------- --------- ------- -------- 18/02 PM 3.4/ 3.9 -0.5/ 0.0 0.2/ 0.7 1 None 19/02 AM 4.2/ 4.7 0.5/ 1.0 0.1/ 0.6 1 None 19/02 PM 3.7/ 4.2 -0.2/ 0.3 0.6/ 1.1 2-3 None 20/03 AM 4.4/ 4.9 0.6/ 1.1 0.1/ 0.6 2 None 20/04 PM 3.1/ 3.6 -0.8/-0.2 0.0/ 0.5 1 None 21/03 AM 4.0/ 4.5 0.2/ 0.8 -0.2/ 0.3 1-2 None Provincetown Harbor MLLW Categories - Minor 13.0 ft, Moderate 14.0 ft, Major 15.0 ft MHHW Categories - Minor 2.9 ft, Moderate 3.9 ft, Major 4.9 ft Total Total Departure Day/Time Tide Tide from Norm Waves Flood ft MLLW ft MHHW ft ft Impact -------- --------- --------- --------- ------- -------- 18/01 PM 10.5/11.0 0.4/ 0.9 0.2/ 0.7 2 None 19/01 AM 11.9/12.4 1.8/ 2.2 0.4/ 0.9 2-3 None 19/01 PM 10.7/11.2 0.6/ 1.1 0.7/ 1.1 3 None 20/02 AM 11.7/12.2 1.6/ 2.0 0.2/ 0.8 3 None 20/02 PM 10.0/10.5 -0.2/ 0.3 0.2/ 0.7 2 None 21/02 AM 11.2/11.7 1.1/ 1.6 0.2/ 0.8 2 None Dennis - Sesuit Harbor MLLW Categories - Minor 13.0 ft, Moderate 14.5 ft, Major 16.0 ft MHHW Categories - Minor 2.5 ft, Moderate 4.0 ft, Major 5.5 ft Total Total Departure Day/Time Tide Tide from Norm Waves Flood ft MLLW ft MHHW ft ft Impact -------- --------- --------- --------- ------- -------- 18/01 PM 11.1/11.6 0.6/ 1.1 0.4/ 0.9 1-2 None 19/01 AM 12.6/13.1 2.1/ 2.6 0.6/ 1.1 2 None 19/01 PM 11.3/11.8 0.8/ 1.3 0.8/ 1.3 2-3 None 20/02 AM 12.6/13.1 2.1/ 2.6 0.5/ 1.0 2 None 20/02 PM 10.9/11.4 0.4/ 0.9 0.4/ 0.9 1 None 21/03 AM 12.3/12.8 1.8/ 2.2 0.4/ 0.9 1-2 None Sandwich Harbor MLLW Categories - Minor 12.0 ft, Moderate 14.0 ft, Major 15.0 ft MHHW Categories - Minor 1.7 ft, Moderate 3.7 ft, Major 4.7 ft Total Total Departure Day/Time Tide Tide from Norm Waves Flood ft MLLW ft MHHW ft ft Impact -------- --------- --------- --------- ------- -------- 18/01 PM 8.9/ 9.4 -1.5/-1.0 0.0/ 0.5 1-2 None 19/01 AM 10.7/11.2 0.4/ 0.9 0.6/ 1.1 1 None 19/01 PM 9.6/10.1 -0.8/-0.2 0.8/ 1.3 2 None 20/02 AM 10.5/11.0 0.2/ 0.7 0.4/ 0.9 1-2 None 20/02 PM 9.1/ 9.6 -1.3/-0.8 0.4/ 0.9 1 None 21/02 AM 10.3/10.8 0.0/ 0.5 0.4/ 0.9 1-2 None Wings Neck MLLW Categories - Minor 6.5 ft, Moderate 9.0 ft, Major 11.5 ft MHHW Categories - Minor 2.1 ft, Moderate 4.6 ft, Major 7.1 ft Total Total Departure Day/Time Tide Tide from Norm Waves Flood ft MLLW ft MHHW ft ft Impact -------- --------- --------- --------- ------- -------- 18/10 PM 4.6/ 5.1 0.2/ 0.7 -0.6/-0.1 1 None 19/10 AM 3.9/ 4.4 -0.6/-0.1 -0.2/ 0.3 1-2 None 19/11 PM 4.0/ 4.5 -0.3/ 0.2 -0.9/-0.4 1-2 None 20/10 AM 3.5/ 4.0 -1.0/-0.5 0.1/ 0.6 1 None 20/11 PM 3.6/ 4.1 -0.9/-0.4 -1.0/-0.5 1 None Nantucket Harbor MLLW Categories - Minor 5.0 ft, Moderate 6.5 ft, Major 8.0 ft MHHW Categories - Minor 1.4 ft, Moderate 2.9 ft, Major 4.4 ft Total Total Departure Day/Time Tide Tide from Norm Waves Flood ft MLLW ft MHHW ft ft Impact -------- --------- --------- --------- ------- -------- 18/01 PM 3.2/ 3.7 -0.3/ 0.2 0.4/ 0.9 3 None 19/02 AM 4.2/ 4.7 0.7/ 1.1 0.2/ 0.8 2 None 19/02 PM 3.4/ 3.9 -0.2/ 0.2 0.5/ 1.0 3-4 None 20/03 AM 4.2/ 4.7 0.7/ 1.1 0.2/ 0.8 3 None 20/04 PM 2.8/ 3.4 -0.8/-0.2 0.1/ 0.6 2 None 21/04 AM 4.0/ 4.5 0.5/ 1.0 0.1/ 0.6 2-3 None # DETAILS -------------------- WHAT Up to one half foot of inundation above ground level expected in low-lying areas near shorelines and tidal waterways (2.6 to 12.8 feet Mean Lower Low Water). WHERE Eastern Essex MA, Suffolk MA, Eastern Norfolk MA, Eastern Plymouth MA, Barnstable MA and Nantucket MA Counties. WHEN From 11 PM EDT this evening through late tonight. IMPACTS Some water on low lying roads and property. ISSUED AT Saturday, April 18, 2026 at 2:13 PM EDT ISSUED BY National Weather Service Boston/Norton MA HEADER Coastal Hazard Message # PRECAUTIONARY/PREPAREDNESS ACTIONS -------------------- Do not drive through flooded roadways. # AREAS AFFECTED -------------------- Eastern Plymouth MA, Barnstable MA, Eastern Essex MA, Eastern Norfolk MA, Nantucket MA, Suffolk MA